分子设计原位配位制备新型丁腈橡胶阴离子受体电解质及其结构与导电机理关系研究

项目名称： 分子设计原位配位制备新型丁腈橡胶阴离子受体电解质及其结构与导电机理关系研究

项目编号： No.51303026

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 一般工业技术

项目作者： 杨树颜

作者单位： 东莞理工学院

项目金额： 25万元

中文摘要： 锂电池用固体聚合物电解质的研究一直都是人们关注的热点。目前，固体聚合物电解质存在着室温离子电导率低、锂离子迁移数低和阴离子定向迁移导致电极极化等问题，阻碍了固体聚合物电解质在高性能锂电池中的应用。针对这些问题，本项目使用分子设计方法调节化合物种类制备出具有强烈Lewis酸特性的1-2种新型硼系化合物，首次引入硼系化合物原位配位络合的方法制备了新型的具有阴离子受体基团和支化结构的丁腈橡胶电解质，揭示阴离子受体基团对解离阴离子的稳定作用、锂离子迁移数和抑制阴离子定向迁移导致电极极化行为的影响。同时，进一步研究这种电解质与另一种聚合物共混形成的两相结构，通过引入硼系化合物原位配位络合的强迫互溶作用在两相界面间形成过渡层，详细探讨这种界面过渡层离子导电机理及其是否能够形成快速离子通道来提高电解质的离子电导率。

中文关键词： 丁腈橡胶；离子电导率；硼酸酯；导电机理；

英文摘要： Solid polymer electrolyte (SPE) in lithium battery has attracted people's great attention from both fundamental understanding and industrial applications. Recently, there are a number of problems including low ionic conductivity at room-temperature and low lithium transference number, as well as electrode polarization caused by orientational transference of anion, in SPE, which prohibits its application in high performance lithium battery. In this project, a series of novel boron compounds with strong Lewis acid character and different ligands are synthesized by molecular design method. In-situ coordination complex reaction between the central boron atom in boron compounds and nitrile group in nitrile-butadiene rubber (NBR) is introduced to acquire a novel kind of SPE with anion receptor group and branched structure. The effect of anion receptor on stabilization of dissociated anion, inhibition of electrode polarization caused by orientational transference of anion and increase of lithium ion transference number is discussed in detail. Furthermore, by mixing novel NBR electrolytes with another polymer, a transition layer can be found in the blend through the forced compatibility process of the in-situ coordination complex action between boron compounds and NBR. The dissociation effect of transition layer for lit

英文关键词： nitrile-butadiene rubber；ionic conductivity；borate ester；conductivity mechanism；